Pump



A J. S. SHOCKLEY.

PUMP.

APPLICATION FILED SEPT- I6| 918.

1,379,785. f Patentedl May 31,1921.

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PUMP.

APPLICATION FILED SEPT2 Is, |918.

1,379,785. "Patented May 31, 1921.

2 SHEETS-SHEET 2.-

.TILES S. SHOGKLEY, or NASHVILLE, TENNESSEE, .asSiGNonfro,THESHOOKLEYMOTOR COMPANY, or Nesnvrnnr., TENNESSEE, A CORPORATION or Diane;

WARE.

PUMP.

To @ZZ w 7mm t muy concern.'

Be it known kthat I, Jrnns S. SHOOKLEY, a citizen of the United States,residing at Nashville, in the county of Davidson and State of Tennessee,have invented a certain new and useful improvement in Pumps, ofk

which the following is a full, clear, and eX- act description, referencebeing had. to the accompanying drawings.

This invention relates to improvements in pumps of the rotary type, andhas for its object the ,production of ay very durable,

smooth running pump of extremely high ef-` ficiency; wherein the workingparts are easily accessible, and'operate with a minimum degree offriction; and wherein, by

the use of suitable joints and packing ele- Vments, leakage iseffectually prevented.

A further object comprehended by my invention-is the production of apump of the foregoing nature through which hard subn stances, such asgravel, slugs and the like may be circulated without injuring the pumpor interfering with its operation. And again, more generally, it is anobject of my invention to provide a simple construction through whichthe foregoing objects are attained.

To thesey ends my invention may be defined as consisting ofthecombinations of elements set forth in the claims annexed hereto andillustrated inthe drawings accompanying and forming a part hereof andwherein Figure 1 is a sectional front elevation of my improved pump;Fig. 2 is a sectional end elevation, the plane of section beingindicated by either of the two section lines 2-2 of Fig.`1; Figs. 8, 1,and 5 are sectional details on the respective correspondingly numberedlines of Fig. "2; Fig. 6-

shows, in perspective, parts of the valve element in separatedcondition; vand Fig. `'7 is a horizontal section through the base online 7 7 of Fig. 1.

In its present embodiment, my invention is incorporated in what may betermed a win pump comprising generally a' base 1,-

pump casings 2 and 3 which are mounted upon ends of the base, and adriving ele-l ment, herein shown as a pulley, is situated between thepump casings foroperating the pumps.

rEhe base 1 consists of a hollow casting divided by a longitudinalpartition 6 into Spe-cicatoii of Letters Patent. j Pmtmtd Mmm; 31, 192i.

Application ledleptember 16, 191,8. Serial No'.V 254,336.

an inlet compartment and an loutlet compartment 8. f1 supply pipe 9 isshown as,

having communicative connection with the central portion of the inletcompartment 7 and 'an exhaust'pipe 10 has similar connection withtheoutlet compartment at a point opposite the piped). It will beobserved that the ends of the base turn upward and that .the upper. faceof each end is smoothed off to form a supporting surface for one Of thepump casings Each of the compartments 7 v*and 8 opens through circularaper-` tures Iformed in these surfaces, and each aperture islsurrounded-.by a` depressedv a plate 17. Below the chamber 15, the'cas-- ing contains inlet and outlet passageways 18 and 19 ywhich openthrough its bottom wall into the chambervand which also oominunicatewith the compartments v7 and 8 of the base 1, the passageways beingseparated by a transverse partitionv wall 2O which registers withthepartition 6 ofthe base. lt will be noted, Yupon referring to Fig. 2,that a' depressed seat 21 surrounds. the lower' ende.A of thepassageways 18 and- 19 and, with the previously -mentionedde-v pressedseats of the base, constitute annular confining recesses for the packingrings or gaskets 22 of lead or other compressible ma# terial, the casingand base being clamped firmly together by screws 23 vor theirequivalents. Because of the confinement/Of the gaskets 22, there is nodanger of their being blown lout by the Vhigh pressure generated withinthe pump.

A. pivot pin25 is supported at its middle'v within a lug 26 that extendsinwardlfrom the outer wall of the passageway 18, the lugk being situatedat the transverse center of the passageway so that the ends ofthe pinare exposed. A valve velement 28 is journaled upon the pivot pin 25and-'comprises halves 29 and 30, shown in detail in Fig. 6. Each halfofthe valve element has an arm 31 that terminates at one end in acylindriico cal boss 32 that is journaled upon one end of the pin 25,and preferably an anti-friction bearing, indicated at 32a, is interposedbetween the pin and boss. rthe opposite ends of the arms 31 carrysections of a fin 88 which has its outer face curved on an arc describedfrom the center of the pin; and the surface of the wall 2O across whichthe fin is designed to move when the valve element is oscillated, isshown Y:similarly curved. Perfect freedom of movement of the valveelement requires that the adjacent surfaces of the wall and iin beslightly spaced apart, and to prevent leakage between the surfaces Iemploy a packing consisting of a bar 35, contained within a groove 36 inthe wall 2O and urged into contact with the face of the fin by a leafspring 87 that is interposed Abetween the back of the bar andthe opposedwall of the groove. The two sections or the halves of the valve elementare secured together by a screw 88 which passes freely through bores inone of the halves and is threaded into the other, a dowel pin 39, whichoccupies registering recesses in the two halves, assisting in holdingthem in proper fixed relation to each other. Vhile the passageways 18and 19 open through the sides of the casing 2, it will be observed thatthey are of less width than the casing where they open into the chamber15, leaving the edge portions of the cylindrical wall of the chamberunbroken at its lower side except at the point where the iin 88 entersthe chamber. To retain the reduced sections of the chamber wall on eachside of the opening of the passageway 18 in proper position, l connectthe free ends of such reduced portions to the face platesV 16 and 17 bydowel pins 40, or their equivalents. My reason for retaining thecylindrical wall of the chamber 15 unbroken so far as possible willpresently become apparent. The valve element 31 is elevated to projectits fin 83 into the chamber 15 by means which 1 shall now describe.Substantially coincident with the vertical center of the inletpassageway 18 is an internally threaded hollow boss 42 in the base. intothis is screwed the upper end of a cup 43 which contains a helicalspring 44. A. head 45 fits into the upper end of the spring and isguided within the cup and has a flange 45 that rests upon the spring. Arod 47 rises from the head 45 and its upper end is forked to receivel abeam 48, the ends of which bear upon the arms 31 of the valve element.1t is clear, therefore, that the spring 44 constantly tends to elevatethe valve element and projects its 1in 88 into the chamber 15. The beam-48 is held against withdrawal from the forked end of the rod 47 as by aCotter ,pin 49 that extends through the branch of the fork above thebeam; and the lower edge of the beam may benotched to embrace the crotchof the fork to hold the beam against longitudinal displacement. 1t willbe apparent upon reection that the beam 48 serves as an equalizer todistribute the force of the spring 44V evenly between the two ends ofthe valve element.

vThe inner face plate 17 of each of the casings 2 and 3 has a centralboss 50, containing an anti-friction bearing 51 within which a shaft 52is journaled, a suitable stuihng box effectually closing the outer endof the boss 5() so as to prevent leakage about the shaft, At its endadjacent the chamber 15, the shaft 52 is provided with a disk 55 whichcarries a crank pin 56, offset a suitable distance from the shaft 52 andextending to within a slight distance of the outer face plate 16. rThehub 57 of a rotor or piston 58 is ournaled, through suitableantifriction bearings 59, upon the crank pin 56, and a transverse lineof its periphery is constantly in contact with a portion of thecylindrical wall of the chamber 15. The piston 58 has a working litbetween the opposed face plates.

The adjacent ends of the opposed pump shafts 52 are coupled together bya connection consisting of a sleeve 60 having transverse key slots thatregister with key slots in the shaft sections and designed to receivewedge keys G1 that are driven through the sleeve and shaft sections andtend to draw the shaft sections toward each other. rllhe hub of thepulley 4 may be secured by any suitable means to the coupling or sleeve50.

The method of assembling and disassembling the apparatus will be clearto those skilled in the art, although it may be stated that to removethe pump shafts, the pulley, which is split, may have its halvesseparated, and removed from the sleeve so that the keys 61 may bedislodged. rl`he outer face plates 15 of the pump casings may beremoved, and a pointed instrument inserted through the aperture 64 ofthe sleeve er coupling 60 between the ends of the shafts 52 to startthem, when they may be withdrawn endwise through the pump casings.

ln the operation of the apparatus, the pulley is driven by suitablemeans to rotate the shafts 52 in the direction indicated by the arrow inFig. 2. This results in each piston 58 being moved about in rollingcontact withthe cylindrical wall of the chainber 15. yit travels up theright hand side of the chamber, as viewed in Fig. 2, it starts to suckin a quantity of fluid through the passageway 18, the receiving chamber,or that to the right hand side of the fin 38, growing gradually largeras the piston is advanced in the direction of the arrow, an-d thesuction is continued until the point of contact between the piston andthe chamber wall reaches the exhaust passageway 19, it

-' chamber and through the exhaust passage-y being understood that the n33 ascends and descends with the action of the piston while bearingconstantly thereagainst. .I ust as soon as the point of contact betweenthe piston and chamber wall moves again to the right of the iin,lthepump starts to inhale a fresh' supply offluid while that previouslydrawn in is being forced about the way 19.

'I have vpreviously'statedvthat solid particles, such as gravel orslugs, could be circulated through the pump without -injuring it orinterfering with its operation. This is due to that fact that suchparticles tend to follow the point of contact between piston andcylinder rather than to fall back and travel just in advance of suchpoint,

because the velocity of the fluid tends to throw such particles forwardand the centrifugal action maintains them adjacent the cylindrical wallwhere the velocity of the fluid is naturally the highest.

By leaving extensions of the chamber wall on each side of the inlet andoutlet passageways 18 and 19 the piston is provided with a continuoustrack or supporting surface so that, even when vrunning at a high rateof speed, it has no tendency to drop into the passageways but will runsmoothly over the parts without the slightest knock.

Having thus described my invention, what I claim is l. In a pump of thecharacter set forth, the combination of a casing having a cylindricalchamber, a cylindrical piston of lesser diameter than the chamber andsituated therein, means for impelling the piston about the chamber incontact with the cylindrical wall thereof, the chamber having an inletand an outlet port, a valve element pivoted exteriorly of the chamberand having a iin projecting through the cylindrical wall of the chamberbetween said ports, and bearing upon the cylindrical face of the pistonthroughoutv the breadth thereof, a rod, an equalizer interposed betweensaid rod and the valve element, and a compression spring supportedwithin the casing and tending to force the ro-d in a direction to engagethe fin of the valve element with the periphery of the piston.

2. In a pump of the character set forth the combination of a casinghaving a cylindrical chamber, a cylindrical piston of lesser diameterthan the chamber and situated therein, means for impelling the pistonabout the chamber in contact with the cylindrical wall thereof, thechamber having an inlet and an outlet port, a valve element pivotedexteriorly of the chamber and having a fin projecting throughthecylindrical wall of the chamber between said ports, said valveelement having spaced parts, a bar having its ends bearing against saidparts, a rod having a forked end loosely embracing the central portionof the bar, and a compression spring supported within .the casing dricalwall thereof, the. chamber having an inlet and an outlet port, a pivotpin supported at its middle by the casing eXteriorly of the chamber, avalve element comprising opposed parts adjustable toward` and from eachother and having each a hub that is journaled upon one end of the'pivotpin, meansfor securing the parts of the valve element together, saidelement including .a iin projecting through the cylindrical wall of thechamber, and means acting to move the valve element in a direction toengage its lin with the periphery of the piston.

4. In an apparatus of the character set forth, the combination of a basecontaining an inlet compartment and an outlet compartment, the ends ofthe base having surfaces through which the aforesaid compartments open,a pump casing surmounting each end of the base and having surfacescontacting with the aforesaid surfaces of the base, the casing havingapertures registering with the openings in the base, pumping mechanismwithin each casing and 1nvolving a shaft projecting therefrom toward theother casing, a coupling element connecting said shafts, and a drivingelement mounted upon the coupling element.

5. In apparatus of the character set forth, the combination of a basecontaining an inlet compartment and an outlet compartment, the ends ofthe base having surfaces through which the aforesaid compartments open,pump casing surmounting each end of the base and having` surfacescontacting with the aforesaid surfaces of the base, each casing havingapertures registering with the openings in the base', pumping mechanismLwithin each casing and involving a shaft projecting therefrom toward theother casing, means connecting said shafts, and a driving elementattached to the shafts between the casings.

6. In apparatus of the character set forth, the combination of-'a basehaving at its ends supporting surfaces the base containing inlet andoutlet compartments opening through said surfaces, a pump casingsurmounting each surface and having passageways communicating with thecompartments of the base, the pump casings having cylindrical chambersthat are substantiallyV in axial alinement and into which saidpassageways open, the ends of each easing heing open, face platesClosing the outer ends of the casing, face plates closing the innei1 o11adjacent ends of the casing and having bearings thereine shaftsjoui'naled Within said bearings and concentric with the cylindricalchambeis, crank pins Caiiied by the shafts and piojeoting into theehznnl'iers Cylindrical pistons journaled upon the crank pins andarranged to traverse the cylindrical Walls OIP the chambers when theshafts are rotated, a iin projecting through the cylindrical Wall ofeach chamber between the aforesaid passageways, means urging the finsinto Contact with the peiipheries of the pistons, and a driving elementapplied to the inner ends of the shafts.

7. ln apparatus of the character set forth, the Combination oi' a base,pumps mounted upon the base in spaced Arelation to each other) theoperating shafts of the pumps approaching each other in axial.alinement` a coupleii assembly connecting the ends oi the opposedshafts, and driving means mounted upon the ooupleiiand serving tomaintain the coupler in assembled Condition. v

l'n testimony whereof l hereunto my signature.

TILES S. SHOCKLEY.

